<template>
  <div class="header">
      this is header
  </div>
</template>

<style lang="scss" scoped>
.header{
    margin-bottom: 100px;
    position: fixed;
    top: 50px;
    width: 100vw;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.5);
}

</style>